Billions of years ago, so the theory goes, a Mars-sized body (sometimes called “Theia”) smashed into our young planet and caused a near-catastrophe. Earth fortunately survived the risk of blowing apart, and the fragments from the crash gradually coalesced into the Moon that we see today. Even though this happened a heck of a long time … Continue reading "Hulk Smash! Collision That Formed Our Moon Shows Up In Lunar Rocks, Study Says"